CLEVELAND, Ohio -- When Hue Jackson called for Corey Coleman to 'make the next jump' in 2017, he didn't mean one followed by another hamstring injury.

But that's exactly what happened in organized team activities when Coleman went up for a deep throw from Brock Osweiler.

Coleman fell awkwardly on the ball with a player on top of him, and came away with a shoulder injury that has since healed and a hamstring injury that will need some rest and treatment during the break if he's to be ready for training camp on July 27.

It was the last thing the Browns needed from last year's No. 15 overall pick, who missed two preseason games with a pulled hamstring and six regular season games with a broken hand as a rookie.

"I'm disappointed for him that he can't continue to grow in the fundamentals and skills at his position,'' receivers coach Al Saunders said at the end of minicamp. "He missed a significant amount of time last training camp [with a hamstring injury]. ... He was having a terrific OTA session and then he got hurt.

"I'm sure that he'll be back for training camp ready to go and he's just got to get his hamstring stronger and get himself in shape.''

The problem is, no matter his fitness, one go-route can aggravate the hamstrings that have given Coleman fits since Baylor. He redshirted his freshman year because of a pulled hamstring and was still hindered in his first season on the field. He also suffered a groin injury and underwent a sports hernia surgery, but still managed to win the 2015 Biletnikoff Award as the nation's best receiver.

He pulled the hamstring again in the intrasquad scrimmage last season and then broke his hand in practice after a two-touchdown game in Baltimore in week two. The injuries derailed his promising rookie season. He finished with only 33 catches in 10 games for 413 yards and three TDs.

"I'm hoping that he'll be healthy,'' said Saunders. "That's why we have the best trainers and the best doctors and the best medical staff in the National Football League. That's their job to get him healthy and he wants to be healthy.''

Even if Coleman returns for camp feeling great, the Browns will probably have to limit him some. Coleman's biggest asset is his 4.37 speed, and the Browns want to take advantage this season.

"The way he understands the offense now is so much better than he did last year,'' Saunders said. "He had a long way to go based on the college offense that he ran and the limited exposure he had to route adjustments and the different route trees, but he's come a long way."

Off the field, Coleman is still under investigation for his role in the beating of Adam Sapp, 26, of Mayfield Heights on New Year's Eve, according to court records. Coleman's brother, Jonathan Coleman, and his friend Jared Floyd have been charged with felonious assault, a second-degree felony. They're scheduled for arraignment on July 5.

The Browns are hoping that Coleman will be cleared and he can focus on living up to his first-round draft status.

The first receiver drafted in 2016, Coleman was ranked 100th out of 115 wideouts by profootballfocus.com. He also had the third-lowest yards per route run of his class at 1.15, and his passer rating of 70.2 when targeted was second lowest of all rookies with at least 50 targets.

"It's tough," Coleman said at the start of the offseason program. "As a rookie coming in, you have to learn a lot of stuff. Then I get hurt. I miss a lot of time. I miss six games. I'm not getting the practice reps. It's just a little bit different.

"Then I come back [and] I'm not even playing with the same quarterback I played with the first two games. A lot of stuff buys into it, but now I know what to expect. I'm looking forward to a great season this year."

Counting on an improved Coleman, the Browns didn't do much to upgrade the unit. They replaced Terrelle Pryor with 1,000-yard receiver Kenny Britt and are relying on other second-year receivers such as Ricardo Louis to make an impact. They inquired about former Chiefs receiver Jeremy Maclin, but didn't bring him in for a visit despite the fact he was open to it, a source said. Maclin, the former first-rounder, signed with the Ravens instead and is seeking a third 1,000-yard season in the last four after recovering from a groin injury in 2016.

The Browns will have to keep their eyes open for quality veterans shaking free in preseason. In the meantime, they have to hope that Coleman can stay on the field.

"We tell all the guys you want to be a member of the -able family,'' said Saunders. "You want to be dependable, reliable, accountable but, most of all, available. That's the most important part there is.''